PABX Internal Call Routing via External Service Platform
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Solution Overview
Problem
Current 'Trunking' architecture in telecommunications limits interoperability between Private Branch Exchanges (PABX) and operator platforms, preventing the rendering of additional services for internal calls within a local network, leading to a degraded user experience due to lack of compatibility with SIP interfaces and private numbering plans.
Innovation Solution
A method that redirects internal requests in a local network to a private identifier via an external service platform, allowing Centrex-type services to be implemented by using a private identifier associated with a user profile, and configuring the automatic switch to route requests transparently, avoiding looping phenomena and tromboning effects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If internal calls are routed locally by the PABX using private numbering plan, then routing efficiency is improved, but additional services from the operator's platform cannot be provided
Solution Approach 1:
The patent introduces an intermediary mechanism where the PABX redirects internal call requests to the operator's platform via a trunk interface. The platform processes the calls and returns results to the PABX, which then completes local routing. This mediator approach allows operator services to be applied to internal calls while maintaining efficient local routing infrastructure.
2Adaptability or versatility
If the PABX manages private numbering plan and routes internal calls locally, then interoperability is improved, but homogeneous service experience cannot be achieved for all calls
Solution Approach 1:
The patent makes the operator's platform universally applicable to both external and internal calls. By routing internal calls through the platform via the PABX intermediary, the system achieves uniform service processing for all call types, ensuring consistent user experience regardless of call origin or destination.
3Ease of operation
If all calls are routed through the operator's platform, then service homogeneity is improved, but network bandwidth is overloaded
Solution Approach 1:
The patent segments the call routing process into two distinct phases: signaling phase and media phase. During the signaling phase, calls are routed through the operator's platform for consistent service processing. During the media phase, voice data is routed directly between endpoints through the PABX, avoiding unnecessary bandwidth consumption on external networks.
4Adaptability or versatility
If internal calls are routed through the external network, then service provision is improved, but unnecessary use of external communication channels occurs
Solution Approach 1:
The patent separates the signaling dimension from the media dimension in call routing. Signaling traffic (control information) traverses the external network through the operator's platform to ensure consistent service processing. Media traffic (voice data) remains within the local network through the PABX, avoiding unnecessary external channel usage and reducing network load.
Data Source
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AI summary
The method involves receiving an automatic exchange of request from initiation of a communication session issued from a terminal when the request is intended for another terminal. The initial request is redirected toward an external platform and bounded for a private identifier associated with a user. The redirected request from the external platform is processed by a profile of a subscriber of the user associated with the private identifier for establishing the communication session between the users. Independent claims are also included for the following: (1) a computer program product comprising a set of instructions for performing a method for initiating a communication session between two users (2) a telephone routing device (3) a service platform (4) a system for initiating a communication session between two users.